body {
    font-family: Arial;
    background-color: #f5f1e8; /* beige */
}

header {
    background-color: #0d47a1; /* azul */
    color: white;
    padding: 15px;
    text-align: center;
}

.chat {
    background: #e3f2fd; /* celeste pastel */
    padding: 15px;
    margin: 10px;
    border-radius: 10px;
}

.mensaje {
    background: white;
    padding: 10px;
    margin: 5px;
    border-radius: 5px;
}

footer {
    background-color: #0d47a1;
    color: white;
    text-align: center;
    padding: 10px;
    position: fixed;
    bottom: 0;
    width: 100%;
}

.login-container {
    width: 350px;
    margin: 80px auto;
    background: #e3f2fd;
    padding: 25px;
    border-radius: 10px;
    text-align: center;
}

.login-container input {
    width: 90%;
    padding: 10px;
    margin: 8px 0;
    border-radius: 5px;
    border: 1px solid #ccc;
}

.login-container button {
    background-color: #0d47a1;
    color: white;
    padding: 10px;
    border: none;
    width: 95%;
    border-radius: 5px;
    cursor: pointer;
}

.login-container button:hover {
    background-color: #1565c0;
}

.error {
    color: red;
}